<template>
  <transition
    name="animate__animated animate__bounce"
    appear
    enter-active-class="animate__fadeInDown"
    leave-active-class="animate__rubberBand"
  >
    <li>
      <label>
        <input
          type="checkbox"
          :checked="todo.done"
          @change="handleCheck(todo.id)"
        />
        <!-- 如下代码也能实现功能，但是不太推荐，因为有点违反原则，这修改了pros,更改了对象里面的值，但是没有被Vue2（object.defineProperty）所检测到 -->
        <!-- <input type="text" v-model="todo.done"> -->
        <span v-show="!todo.isEdit">{{todo.title}}</span>
        <input
          ref="editRef"
          v-show="todo.isEdit"
          type="text"
          :value="todo.title"
          @blur="handleBlur(todo,$event)"
        >
      </label>
      <button
        class="btn btn-danger"
        @click="handleDelete(todo.id)"
      >删除</button>
      <button
        v-show="!todo.isEdit"
        class="btn btn-edit"
        @click="handleEdit(todo)"
      >编辑</button>
    </li>
  </transition>
</template>

<script>
import 'animate.css'
import pubsub from 'pubsub-js'
export default {
  name: 'MyItem',
  props: ['todo'],
  data() {
    return {

    }
  },
  methods: {
    //勾选或者取消勾选
    handleCheck(id) {
      //通知app组件将对应的todo对象的done值取反
      // this.checkTodo(id);
      this.$bus.$emit('checkTodo', id)
    },
    //删除todo
    handleDelete(id) {
      if (confirm('确定删除吗？')) {
        //通知app组件将对应的todo从todos中删除
        // this.deleteTodo(id);
        // this.$bus.$emit('deleteTodo', id)
        pubsub.publish('deleteTodo', id)
      }
    },
    //编辑
    handleEdit(todo) {
      // this.todo.isEdit = true

      if (todo.hasOwnProperty('isEdit')) {
        todo.isEdit = true
      } else {
        this.$set(todo, 'isEdit', true)
      }
      this.$nextTick(() => {
        this.$refs.editRef.focus()
      })
    },
    //input框失去焦点
    handleBlur(todo, e) {
      // console.log(e.target.value);
      todo.isEdit = false
      if (!e.target.value.trim()) return
      this.$bus.$emit('updateTodo', todo.id, e.target.value)
    }
  },
}
</script>

<style scoped>
/*item*/
li {
  list-style: none;
  height: 36px;
  line-height: 36px;
  padding: 0 5px;
  border-bottom: 1px solid #ddd;
}

li label {
  float: left;
  cursor: pointer;
}

li label li input {
  vertical-align: middle;
  margin-right: 6px;
  position: relative;
  top: -1px;
}

li button {
  float: right;
  display: none;
  margin-top: 4px;
}

li:before {
  content: initial;
}

li:last-child {
  border-bottom: none;
}

li:hover {
  background-color: skyblue;
}

/* 给todo添加动画效果 */
/* .todo-enter-active {
  transition: all 0.3s ease;
}

.todo-leave-active {
  transition: all 0.3s ease;
} */
</style>